Solar cell



FIG. 1 is a front elevational view of a first embodiment of the solar cell;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is an enlarged view of the area 7 in FIG. 1;

FIG. 8 is a front elevational view of a second embodiment of the solar cell; and,

FIG. 9 is an enlarged view of the area 9 in FIG. 8.

The broken lines depict the boundaries of the enlarged areas shown in FIGS. 7 and 9, and form no part of the claimed design. The top plan view, bottom plan view, left-side elevational view, right-side elevational view, and rear elevational view are the same for the first embodiment and the second embodiment. Thus, those views are not provided for the second embodiment. 

CLAIM The ornamental design for a solar cell, as shown and described. 